Lethe — ORC Rating | RegattaPages

GPH

635.8

OSN

620.1

LOA

9.982 m

Displacement

4594 kg

Triple-Number Ratings

Lower is faster

Triple Inshore

Low

0.6427

Medium

0.8576

High

0.9654

Triple Offshore

Low

0.8336

Medium

1.0618

High

1.1736

Boat Specifications

Dimensions

Length overall: 9.982 m
Beam: 3.37 m
Draft: 2 m
Displacement: 4594 kg
Crew weight: 585 kg
Wetted surface: 23.46 m²

Sails

Mainsail: 35.61 m²
Genoa: 26.39 m²
Spinnaker: 0 m²
Asymmetric spinnaker: 92.73 m²

Design

Type: First 34.7
Builder: Beneteau
Designer: B.Farr
Year built: 2004
Stability index: 122.8

Velocity Prediction

Polar CSV

Each row is TWS followed by TWA and boat-speed pairs. Paste it directly into WX Navigator or compatible navigation software.

6,43,4.484834,52,5.03,60,5.33,75,5.76,90,6.01,110,5.8,120,5.59,135,5.06,145.1,4.560131,150,4.32
8,41.8,5.325456,52,5.97,60,6.27,75,6.7,90,6.88,110,6.81,120,6.7,135,6.23,147.8,5.530652,150,5.41
10,40.8,5.957767,52,6.6,60,6.8,75,7.09,90,7.29,110,7.3,120,7.23,135,6.97,148.7,6.436823,150,6.35
12,39.6,6.242592,52,6.89,60,7.06,75,7.26,90,7.59,110,7.7,120,7.66,135,7.4,150,6.92,150.5,6.882244
14,39,6.317989,52,6.99,60,7.19,75,7.43,90,7.81,110,8.03,120,8.13,135,7.84,150,7.23,166.4,6.522895
16,39.1,6.378485,52,7.04,60,7.25,75,7.59,90,7.96,110,8.41,120,8.57,135,8.32,150,7.52,175.4,6.872136
20,39.4,6.509359,52,7.11,60,7.31,75,7.72,90,8.22,110,9.01,120,9.14,135,9.43,150,8.2,176.3,7.515666

Wind Speed	52°	60°	75°	90°	110°	120°	135°	150°
6	5.03	5.33	5.76	6.01	5.8	5.59	5.06	4.32
8	5.97	6.27	6.7	6.88	6.81	6.7	6.23	5.41
10	6.6	6.8	7.09	7.29	7.3	7.23	6.97	6.35
12	6.89	7.06	7.26	7.59	7.7	7.66	7.4	6.92
14	6.99	7.19	7.43	7.81	8.03	8.13	7.84	7.23
16	7.04	7.25	7.59	7.96	8.41	8.57	8.32	7.52
20	7.11	7.31	7.72	8.22	9.01	9.14	9.43	8.2

Wind Speed	Beat Angle	Beat VMG	Run Angle	Run VMG
6	43°	3.28	145.1°	3.74
8	41.8°	3.97	147.8°	4.68
10	40.8°	4.51	148.7°	5.5
12	39.6°	4.81	150.5°	5.99
14	39°	4.91	166.4°	6.34
16	39.1°	4.95	175.4°	6.85
20	39.4°	5.03	176.3°	7.5

Loading polar chart…